package com.woldier.config;

import com.woldier.common.JacksonObjectMapper;
import org.springframework.context.annotation.Configuration;
import org.springframework.http.converter.HttpMessageConverter;
import org.springframework.http.converter.json.MappingJackson2HttpMessageConverter;
import org.springframework.web.servlet.config.annotation.ResourceHandlerRegistry;
import org.springframework.web.servlet.config.annotation.WebMvcConfigurationSupport;

import java.util.List;

@Configuration
public class WebMVCConfig extends WebMvcConfigurationSupport {

    /**
     * 设置静态资源映射
     * @param registry
     */
    @Override
    protected void addResourceHandlers(ResourceHandlerRegistry registry) {
        registry.addResourceHandler("/backend/**").addResourceLocations("classpath:/backend/");
        registry.addResourceHandler("/front/**").addResourceLocations("classpath:/front/");
    }

    /**
     * spring mvc的类型转换器
     * @param converters
     */
    @Override
    protected void extendMessageConverters(List<HttpMessageConverter<?>> converters) {
        /*创建消息转换器对象*/
        MappingJackson2HttpMessageConverter messageConverter = new MappingJackson2HttpMessageConverter();
        /*设置对象转换器,底层使用Jackson将java对象转入json*/
        messageConverter.setObjectMapper(new JacksonObjectMapper());
        /*将上面的消息转换器对象追加到mvc框架的转换器集合中*/
        converters.add(0,messageConverter);
    }
}
